Ken
My resource is a copy of the Service Manual for the 1958 (R) washers. I do not have the ability to scan this document. I could send it to Robert, but it does contain 87 pages of text - a bunch!
I misread the seller's post. I saw '650R' and I do find that model in the manual, however it does not have the suds saver/return system. This document includes:
WA955R
WA950R
WA855R
WA850R
WA650R
WA450R
It's possible that the above list is what GE began the year with, and like you say and we know, they added models as they saw a market for them.
What threw me initially was the location of the timer - left side of the console. In 1957 (P), all timers were on the left. In 1958 (R), ONLY the TOL model with the piano key console had the timer on the right; all other models used the old stampings and kept the timer on the left. By 1959 (S), all of the timers were moved to the right side of the console.
I sent the seller a question, asking if he could confirm the model number. Let's see what he says.
lawrence